CVE-2025-67230
Published: 23 January 2026
Summary
CVE-2025-67230 is a high-severity Incorrect Default Permissions (CWE-276) vulnerability in Todesktop Builder. Its CVSS base score is 7.1 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Client Execution (T1203); ranked at the 5.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2025-67230 is an improper permissions vulnerability (CWE-276) affecting the handler for the Custom URL Scheme in ToDesktop Builder version 0.33.0. Published on 2026-01-23, it carries a CVSS v3.1 base score of 7.1 (AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H). The issue stems from insufficient validation, enabling attackers with renderer-context access to invoke external protocol handlers.
Exploitation requires low privileges (PR:L) and renderer-context access, occurring over the network (AV:N) but demanding high attack complexity (AC:H) and user interaction (UI:R). Successful attacks can achieve high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H) within the unchanged scope (S:U).
Mitigation guidance appears in ToDesktop's security advisory TDSA-2025-002 at https://www.todesktop.com/security/advisories/TDSA-2025-002 and changelog at https://www.todesktop.com/changelog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-4278
Vulnerability details
Improper permissions in the handler for the Custom URL Scheme in ToDesktop Builder v0.33.0 allows attackers with renderer-context access to invoke external protocol handlers without sufficient validation.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Vulnerability in custom URL scheme handler directly enables exploitation for client execution via malicious protocol invocation from renderer context.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly enforces access permissions on the custom URL scheme handler to block unauthorized external protocol invocations from renderer context.
Requires validation of all inputs to the custom URL scheme handler, directly addressing the insufficient validation flaw.
Restricts renderer-context privileges so that external protocol handlers cannot be invoked beyond the minimum necessary permissions.